Our drive and ambition peak at the age of 33, according to a new study.
This is the point the average person is the most motivated and determined to achieve their goals - whether they be to do with career progression or being physically fit.
Having higher levels of energy and confidence, as well as adopting a positive outlook on life, are qualities that lead to the peak.
While determination to succeed may be at its zenith during our early to mid-thirties, motivation is still a struggle for most adults overall, with half admitting it is 'a battle'.
The results came from a study of 2,000 adults commissioned by Bupa Health Clinics to mark the launch of I Quit, a campaign urging people to 'quit the fads and focus on making a long-term change'.
Dr Naveen Puri from Bupa Health Clinics said: "Drive plays an important role in achieving our goals no matter what they are.
"Of course, everyone wants to reach their goals but doing so isn't always as easy as they may think.
"Having support can make all the difference and can help keep you on track when facing obstacles along the way.
"When setting goals, I would advise making these realistic to your ability.
"For example, if you've never run before, why not aim to do a 5K race within three months rather than wanting to run a marathon in a year.
"Once you've achieved this, you'll have a sense of achievement which will give you more motivation for future goals."
The study also found those polled had an average of four goals, with saving money, eating healthily and getting fit the most common.
Despite 85 per cent claiming they 'tend' to stick to their goals until they succeed, 86 per cent admitted they're not 'completely confident' they will achieve their aims.
The biggest barriers to succeeding include not having enough money, not having enough time - and laziness.
Although having to pursue goals alone and without any support or guidance also emerged as major hindrances among those polled.
Dr Naveen Puri added: "It is really encouraging to see so many people putting their health and fitness as a key focus, no matter what their age.
"In our health clinics, we see many people who have taken up fad diets throughout January and we want to encourage people to adopt a healthier approach that they can maintain all year round - with the ongoing support of our lifestyle and health advisors."
